Contango
Contango is a futures market condition in which the futures price of an asset is higher than the expected future spot price (or the current spot price plus carrying costs), resulting in an upward-sloping futures curve where longer-dated contracts trade at a premium to near-month contracts.
Contango was the normal condition for most commodity and financial futures markets, reflecting the cost of carry — the expenses associated with storing, financing, and insuring an asset until the future delivery date. For an equity index like Nifty, carrying cost comprised the risk-free interest rate (the cost of funding the equivalent cash position) minus expected dividend yield. When short-term interest rates exceeded the anticipated dividend yield on the index, Nifty futures traded at a premium to the spot index — a condition known as fair value contango.
In practical terms on NSE, a Nifty spot at 22,000 with a one-month carrying cost of approximately 0.5 percent would imply Nifty near-month futures at around 22,110. The two-month futures might be at 22,220, and the three-month at 22,330, creating an upward-sloping (contango) curve. This was the mathematically expected structure under no-arbitrage conditions. Cash-futures arbitrageurs — institutional traders who simultaneously bought Nifty cash basket stocks and sold Nifty futures — continuously exploited any deviation from fair value, keeping the basis within narrow bounds.
For commodity futures, contango had additional dimensions related to physical storage costs and convenience yield. Crude oil, for example, traded in extended contango during periods of oversupply because the market priced in not just financing costs but also storage fees for barrels sitting in tanks. India's MCX (Multi Commodity Exchange) crude oil and natural gas contracts frequently exhibited contango driven by global supply-demand dynamics and domestic storage infrastructure constraints.
A significant consequence of contango for investors using futures-based products was the negative roll yield. An investor who continuously rolled long futures contracts in a contango market paid the premium each month, effectively losing money on each roll even if the spot price remained flat. This was a known disadvantage of futures-based commodity ETFs compared to physically backed ETFs, and Indian investors using commodity fund-of-funds needed to be aware of how the roll methodology affected returns.
Contango conditions provided an opportunity for cash-and-carry arbitrageurs to earn near-risk-free returns by buying spot assets and simultaneously shorting futures. As these arbitrage flows increased, they compressed the premium between futures and spot, keeping the basis aligned with theoretical fair value. The health of this arbitrage mechanism was a sign of market efficiency and adequate participation by institutional players in India's F&O ecosystem.